The Reasearch Of Wireless Sensor Network Route Agreement Using In The Farmland

With the progress in transducer technology, microelectric technique, embedded computing technology and wireless communication,WSN (Wireless Sensor Networks) developed rapidly,WSN integrated four major technology.such as transducer, embedded calculating, the distributed information processing and wireless communicating , it is a kind of brand-new information acquisition, processing and transmission technology. It can apply to these fields such as military, environmental monitoring, medical aid, commerce and so on, therefore it has very broad application prospects.The wireless sensor network is made up of a large number of miniature sensor nodes, and such nodal energy of miniature sensor do not change again after laying, especially in the farmland. So energy is the most important resources of the wireless sensor nodes, it directly affect the life of network. So the energy-conserving problem becomes a main goal of wireless sensor network .Route technology is the key technology of the wireless sensor network, also is the one of the most important affect of the network. Traditional fixed route agreement of network is no longer adapt to wireless sensor network dynamic change topological structure, so some route agreements that specially directs against the wireless sensor network has been proposed in recent years, such as LEACH, PEGASIS, TEEN,etc. Among them LEACH agreement is an earlier agreement directed against the wireless sensor network. It is one of adapting itself ,aslo organizing itself, with effective energy in clusters. Considering the network characteristic of the wireless sensor network, the agreement transmitted high energy consumption on every nodes ,which has lengthened the existence time of wireless sensor network. However, the scheme of the random choice of the head has not formed the most effective optimum in a cluster, because it does not considered the nodal geographical position in the course of choosing, either in considering the surplus energy of node.This text has summarized the development of WSN, described its concept, structure, characteristic, analyzed the procotol of the wireless transducer network,studied the procotol system of WSN and classification of routing,choiced the route agreement LEACH as studying, analyzed its existing problem, and proposed the improvement scheme on the basis of original algorithm. Adapted from PEGASIS ,DD,etc. The final goal of agreement of WSN is to improve energy validity, lengthen network life. This text has optimized LEACH from several following respects:First: In the forming stage, choosing course and number optimizing to head of forming a cluster;Second: Take multihop between clusterhead and sink node, the clusterhead sending data to neighbouring node instead of sink node, reducing every node energy consumption, it is balanced to realize the load of network;Third: Adopted the thought of DD, formed the gradient the inside a cluster, similar to PEGASIS, but did not need to know each position information, also saved the expenses greatly.This paper has emulated and analyed with NS2, which result shows, the whole energy consumption of the system has reduced, network life has improved by more than 10%, channel occupancy has reduced. Combined the conclusion finally, proposed some prospects.